OSORNO, Guillermo. Lester D. Langley. Central America : The Real Stakes. Chicago. Ill. : Dorsey Press, 1988. 280 p. Foro Internacional, México, Ciudad de México, v. 29, n. 4, p. 742–744, 1989. Disponível em: https://forointernacional.colmex.mx/index.php/fi/article/view/1198. Acesso em: 10 may. 2025.